our environment which is one thing we can change, but also our genetics. >> stephen: you can bring things back from the dead? and were you behind mitt romney's performance last night? (laughter) (cheers and applause) >> we can make copies of things that have elements of animals or bacterias, so forth that were extinct. >> stephen: okay so, you are work on the woolly mammoth, right. >> it's a possibility. first thing that is amazing progress in the field is being able to sequence the genome of the little broken up bits of dna that are present in mammoth remains and many other animals in museums. >> stephen: have you ever stored anything on dna other than animal information. >> we stored the-- . >> stephen: how is this book on dna? >> there you go, 20 million copies, don't eat it, stephen. >> stephen: where is it, where is the-- what dow mean. >> right there in that dot. >> stephen: hold on. that do the right there, what's in there. >> so we took the book including the photographs. >> stephen: yes. >> 0s and 1st, converted to accs and ts. >> stephen: which is the code of dna. >> yup.